IJ32387: SCALABLEVG VARYONVG -NCA FAIL(CONC VG) WHEN MIRRORED DISKS FAIL APPLIES TO AIX 7100-05

APAR status

• Closed as program error.

Error description

• Scalable VG fails to varyonvg in active concurrent mode
  when mirrored storage is in failed state, where as
  regular VG (small VG) succeeds when quorum is disabled.
  
  NOTE:Both scalable and small VG's are varied on in
  passive mode succesfully
  and then mirrored storage was failed before varyonvg in
  active concurrent mode.
  (Both VGs are quorum disabled)
  
  It fails with the following error messages.
  
  # varyonvg -ncA scalablevg
  0516-062 varyonvg: Unable to read or write logical volume
  manager
          record. PV may be permanently corrupted. Run
  diagnostics
  # varyonvg -ncA smallvg
  PV Status:      hdisk3  00f87c4bf90ec249        PVMISSING
                  hdisk4  00f87c4bf90ec64f        PVACTIVE
  varyonvg: Volume group smallvg is varied on.
  

Local fix

• use force option to varyonvg in a concurrent mode
  after varied on in passive mode.
  
  #varyonvg -f -ncA VG_NAME
  

Problem summary

• varyonvg -A of an SVG may fail if a LUN is disabled on the
  storage, or if otherwise some error allows open() of the disk,
  but fails read().
  

Problem conclusion

• Modify logic to save data from readable disks rather than
  openable disks, to allow varyonvg -A to proceed.
  

Temporary fix

Comments

• 7100-05 - use AIX APAR IJ32387
  7200-04 - use AIX APAR IJ34435
  7200-05 - use AIX APAR IJ31959
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IJ31959

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U888928

     UP21/08/30 I 1000